feat(tun): route all on linux #2267

Job	Run time
x86_64-unknown-linux-gnu	3m 11s
i686-unknown-linux-gnu	3m 12s
x86_64-unknown-linux-gnu-static-crt	3m 12s
x86_64-unknown-linux-musl	3m 15s
i686-unknown-linux-gnu-static-crt	3m 12s
aarch64-unknown-linux-gnu	3m 13s
armv7-unknown-linux-gnueabi	3m 17s
armv7-unknown-linux-gnueabihf	3m 12s
aarch64-unknown-linux-gnu-static-crt	3m 14s
aarch64-unknown-linux-musl	3m 14s
armv7-unknown-linux-gnueabi-static-crt	3m 13s
armv7-unknown-linux-musleabihf	3m 11s
x86_64-pc-windows-msvc	3m 10s
i686-pc-windows-msvc	3m 9s
x86_64-pc-windows-msvc-static-crt	3m 10s
i686-pc-windows-msvc-static-crt	3m 10s
x86_64-apple-darwin	3m 14s
aarch64-apple-darwin	3m 14s
x86_64-apple-darwin-static-crt	3m 11s
aarch64-apple-darwin-static-crt	3m 14s
Docker Image	1s
Release	1s
	1h 4m 10s

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